If a particular type of operation is performed often, the frequency of the corresponding task can be increased to reduce the amount of work each task has to perform.
如果有一种特定类型的操作经常执行，那么相应任务的频率可以增加以降低每一项任务必须执行任务的数量。
While Google's content delivery data centers perform very well for the task that they perform, they are not apples-to-apples comparable to a business-critical enterprise operation.
虽然Google的内容交付数据中心在执行任务时的表现非常好，但它们与一个运行关键业务的企业数据中心是截然不同的。
Although you can have an add-in task perform an operation and quit, typically add-in tasks are used for operations that need to be performed periodically.
尽管可以让插件任务(add - in task)执行某一项操作并退出，但插件任务通常用于需要定期执行的操作。
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